Patents by Inventor Detlev Claes

Detlev Claes has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for the production of nitric acid
    Patent number: 7258849
    Abstract: The invention relates to a method for the production of nitric acid having a concentration of between 50 and 76%, from ammonia and gas containing oxygen, under pressure, according to a single pressure method or dual pressure method. The expansion of the residual gas takes place in at least two stages in a work efficient manner. At least one device for heating the previously expanded gas to a temperature of more than 450° is disposed between every other expansion stage, using waste heat from the production process of nitric acid.
    Type: Grant
    Filed: February 15, 2003
    Date of Patent: August 21, 2007
    Assignee: UHDE GmbH
    Inventors: Frank Dziobek, Detlev Claes, Joachim Johanning, Rainer Maurer, Erich Szonn
  • Method for the production of nitric acid
    Publication number: 20050106092
    Abstract: The invention relates to a method for the production of nitric acid having a concentration of between 50 and 76%, from ammonia and gas containing oxygen, under pressure, according to a single pressure method or dual pressure method. The expansion of the residual gas takes place in at least two stages in a work efficient manner. At least one device for heating the previously expanded gas to a temperature of more than 450° is disposed between every other expansion stage, using waste heat from the production process of nitric acid.
    Type: Application
    Filed: February 15, 2003
    Publication date: May 19, 2005
    Inventors: Frank Dziobek, Detlev Claes, Joachim Johanning, Rainer Maurer, Erich Szonn